Sterilization indicator



FIG. 1 is a top plan view of a sterilization indicator showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof; _

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top perspective view thereof. 

The ornamental design for a sterilization indicator, as shown. 